Today is National Dog Day and we all know how much our country music favorites love their four-legged best friends. They tweet about them, share Facebook photos, Instagram them, and bring them on tour for companionship and a little bit of home out on the road. To celebrate today, the real dog day of summer, we have seven quick clicks of country stars’ beloved pups. Prepare to be overloaded with cuteness, ladies and gentlemen! 1....